Since I built my ported Tempest sub a while back, I have been using my little JVC mini-system to power it. It probably puts out about 30 watts of true power. But it is not the lack of power that bugs me(it goes plenty loud). The extension is terrible. From playing test tones I have determined the minisystem rolls off frequnecy below 35hz. I know the sub hits this low because I used my parents 220 watt Technics amp for a bit and it would shake the hell out of the room at 18hz. Now I am looking for a new amp. I want to be as cheap as possible. The salesman at my local Paradigm dealer(same guy who sold me the Titans and CC-170)offered me a car amp he has. It is a Kenwood amp which he claims is rated for about 600(or so)watts, but admits true bridged power is about 150 watts into 4ohms. Assuming I have the hardware to use a 12v component on a 110V AC supply, is it ok to use a car amp? Basically what I am worried about is whether or not the amp will play frequnecies from 20hz to about 100hz without any attenuation. Should I be worried or will a car amp do the job?